diff --git a/common/libraries/SsApi.php b/common/libraries/SsApi.php
index f9eb43b6..83441956 100644
--- a/common/libraries/SsApi.php
+++ b/common/libraries/SsApi.php
@@ -117,7 +117,7 @@ class SsApi
 
     public function getBiz($biz_id, $cache = true)
     {
-        $cacheKey = "SYTSTOPIC_SSAPI_BIZ_{$biz_id}";
+        $cacheKey = "SYSTOPIC_SSAPI_BIZ_{$biz_id}";
         $redis = &load_cache();
         if ($cache) {
             $bizInfo = $redis->get($cacheKey);